JP2001268475A - Image quality adjustment method and image quality adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly provide an optimum adjustment state. SOLUTION: A display picture 1 is bisected into a left region and a right region, the left part 2L of a source image 2 is displayed in the left region and simultaneously an image for which the image quality of the right part of the source image 2 is adjusted is displayed in the right region as an adjustment image 3R. In this state, a person performing adjustment changes the direction and degree of the adjustment and sets the optimum adjustment state. When the optimum adjustment state is attained, the person performing the adjustment cancels an image quality adjustment mode. Thus, an adjusted image 9 for which the image quality of the entire source image 2 is adjusted is displayed in the entire region of the display picture 1. The image for which the source image 2 is compressed to the position and size of the left region can be displayed inside the left area and simultaneously the image for which the image quality of the image for which the source image 2 is compressed to the position and size of the right region is adjusted can be displayed inside the right region.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image quality adjusting method and an image quality adjusting device for a disc player, a TV (Television) receiver and the like.

[0002]

2. Description of the Related Art A disc player reproduces an image from a disc and displays the image on a display screen of an image display device, or a TV receiver receives an image and displays the image on the display screen. In such cases, to adjust the image quality such as the average brightness and contrast of the image, conventionally, operating the adjustment means provided in the player, the receiver, etc., or adjusting the image quality adjustment parameters to the player, the receiver, etc. Settings to adjust the image quality of the entire image displayed on the display screen.

[0003]

However, in the above-described conventional method, the entire image displayed on the display screen is adjusted. Therefore, in which direction and how much adjustment has been made before adjustment. Cannot be clearly grasped, and it takes time and effort to achieve the optimum adjustment state, and in some cases, there is a disadvantage that the optimum adjustment state cannot be obtained as a result.

Accordingly, the present invention is to easily and quickly obtain an optimum adjustment state.

[0005]

According to the image quality adjusting method of the present invention, a display screen of an image display device is divided into an original area and an adjustment area, and an image signal of a portion displayed in the original area in the original image is displayed. Or an original signal which is an image signal of an image obtained by compressing the original image to a position and size in the original area, and an image signal of a portion displayed in the adjustment area in the original image, or the original image An image signal of an image compressed to a position and a size within the image signal and an adjustment signal that is an image signal obtained by performing image quality adjustment processing are combined and output to the image display device, and the display screen displays the original signal based on the original signal. An original image and an adjustment image based on the adjustment signal are simultaneously displayed.

According to this method, an image before image quality adjustment and an image after image quality adjustment are compared on a display screen,
Since the image quality can be adjusted, the optimum adjustment state can be obtained easily and quickly.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Overview of System Embodiment: FIG. 1] FIG. 1 shows an embodiment of a system to which the present invention is applied, in which a video signal obtained by a video playback device 10 is converted to a video playback device. In this case, an image is output to an image display device 20 connected to the image display device 20 and provided with a CRT display, a liquid crystal display, or the like, and an image is displayed on the display screen 1.

[0008] In this example, the video reproducing device 10 is a DVD.
(Digital Video Disc, Digit
al Versatile Disc) player and the like, and a video signal and an audio signal are recorded on the disk 11 by, for example, an MPEG (Moving P
icture Experts Group 2 standard, and are multiplexed and recorded.
It is read by the optical head 12.

[0009] The information read from the disk 11 at the output of the optical head 12 is supplied to an RF processor 13 from which a video and audio data stream of the MPEG2 standard is obtained.

[0010] The video / audio data stream from the RF processor 13 is separated into a video data stream and an audio data stream by the MPEG decoder 14 and decompressed and decoded.

The video data output from the MPEG decoder 14 is separated into luminance data and chrominance data by an image quality adjustment unit 15 which is a video reproduction processing unit, and an image quality adjustment process is performed on the separated luminance data or chrominance data. After
The luminance data and the chrominance data are combined to obtain video data in the same format as the video data output from the MPEG decoder 14.

The video data from the image quality adjustment unit 15 is NT
The SC / PAL encoder 16 converts the signal into an NTSC video signal or a PAL video signal and outputs the signal to the image display device 20. However, the format or format of the video signal output from the video playback device 10 is not limited to the NTSC format or PAL format.
Other methods such as a progressive method may be used, and not only an analog video signal but also digital video data may be used.

Although omitted in the figure, the MPEG decoder 14
The audio data of the output of is reproduced by the audio reproduction processing unit,
The video data is output from the video reproduction device 10 after being converted into an analog audio signal or as digital audio data without conversion.

The image quality adjustment unit 15 is provided with an image quality adjustment unit 1.
5 is provided with an adjustment control unit 17 for controlling the image quality adjustment, and the adjustment control unit 17 is controlled by a system control unit 18 for controlling the entire video reproduction device 10.

An operation unit 19 such as a remote controller is provided for the system control unit 18.
Thus, setting and operation of image quality adjustment can be performed. The method for adjusting the image quality is as follows.

[Embodiment of Image Quality Adjustment Method: FIGS. 2 to 9] (Image Division Method: FIGS. 2 to 4) FIG. 2A shows the entire original image 2 before image quality adjustment on the entire display screen 1. Indicates the status that is being performed. In the first method, in the image quality adjustment mode,
The image quality is adjusted by the following method. Hereinafter, this method is referred to as an image division method.

<Image Splitting Method—FIG. 2B> In the image splitting method, as an example, as shown in FIG. 2B, the display screen 1 is divided into a left area (the first half of the horizontal period) and a right area. (The latter half of the horizontal period) and the left part 2L of the original image 2
Is displayed in the left area, and at the same time, an image obtained by adjusting the image quality of the right part of the original image 2 is displayed in the right area as the adjusted image 3R.

That is, an image is displayed in the left area of the display screen 1 by the video data before the image quality adjustment in the left part of the original image 2, and the image quality in the right area of the original image 2 is displayed in the right area of the display screen 1. An image is displayed based on the video data after the image quality adjustment processing is performed on the video data before adjustment.

In this case, it is desirable to display the bright line 4 at the boundary between the left and right regions of the display screen 1. Instead of the bright line 4, another boundary line may be displayed.

Further, a character 6 indicating that it is an image before adjustment is displayed in the left portion 2L of the original image, and a character indicating that it is an image after adjustment is also displayed in the adjusted image 3R. 7 is desirably displayed. Other signs may be displayed instead of the characters 6 and 7.

In the adjustment image 3R, it is desirable to display image quality adjustment items such as average luminance and contrast, and characters 8 indicating the direction or degree of adjustment at that time, or adjustment parameters. Instead of the character 8, other signs may be displayed.

With the original image left portion 2L and the adjustment image 3R displayed simultaneously in the left and right regions of the display screen 1, the person making the adjustment changes the direction and degree of the adjustment.
Set the optimal adjustment state. At this time, the part indicating the adjustment direction and degree or the adjustment parameter in the character 8 is also changed accordingly.

According to this, since the image quality can be adjusted while comparing the left portion 2L of the original image and the adjusted image 3R and the character 8, the optimum adjustment state can be obtained easily and quickly. it can.

When the optimum adjustment state is reached, the person who made the adjustment cancels the image quality adjustment mode. As a result, FIG.
As shown in (C), the adjusted image 9 in a state where the image quality of the entire original image 2 has been adjusted is displayed on the entire display screen 1.

For example, when adjusting the image quality for a plurality of image quality adjustment items, such as adjusting the average brightness and sharpness (sharpness), the image quality adjustment is simultaneously performed for the plurality of image quality adjustment items by the above-described method. After the image quality adjustment is performed for one image quality adjustment item by the above-described method, the image quality adjustment can be performed for the next image quality adjustment item by the same method.

In the latter case, at the time of image quality adjustment for the next image quality adjustment item, an image whose quality has been adjusted is displayed for the first image quality adjustment item as the left portion 2L of the original image, and the first image quality adjustment is performed as the adjusted image 3R. It is desirable to display images whose image quality has been adjusted for both the item and the next image quality adjustment item. However, as the original image left portion 2L, an image whose image quality has not been adjusted for the first image quality adjustment item is displayed, and the adjusted image 3 is displayed.
As R, an image whose image quality has been adjusted only for the next image quality adjustment item is displayed, and after the image quality adjustment mode is released, the image whose image quality has been adjusted for both the first image quality adjustment item and the next image quality adjustment item is displayed on the entire display screen 1. May be displayed.

<Image 4-split method ... FIGS. 3 and 4> In the image split method, as another example, as shown in FIG. 3 or FIG. 4, the display screen 1 is displayed in the upper left area (in the first half of the horizontal period,
And the first half of the vertical period), the upper right region (the latter half of the horizontal period and the first half of the vertical period), the lower left region (the first half of the horizontal period and the latter half of the vertical period), and the lower right region (the horizontal period) And the second half of the vertical period), the upper left portion 2A of the original image is displayed in the upper left region, and the image quality of the upper right portion, lower left portion, and lower right portion of the original image are adjusted at the same time. The images in the state are displayed in the upper right area, the lower left area, and the lower right area as adjusted images 3B, 3E, 3C, or 3F, 3D, or 3G, respectively.

In this case, it is desirable to display the bright lines 4 and 5 at the boundaries of each area of the display screen 1.

FIG. 3 shows the case where the same image quality adjustment item, for example, an image whose image quality has been adjusted by changing the direction or degree of adjustment with respect to the average luminance is displayed as the adjustment images 3B, 3C, and 3D. In 3C and 3D, markers 7b, 7c, such as characters indicating the image quality adjustment item and the direction and degree of each adjustment or the parameter for adjustment are provided.
7d is displayed.

According to this, four images 2A, 3B, 3
By comparing C and 3D, an optimal adjustment state can be obtained quickly and accurately.

When adjusting the average luminance of an image, for example, to increase the average luminance, the luminance data may be corrected according to a correction characteristic (input / output characteristic) as shown by a straight line L1 in FIG. However, when the DC level of the luminance signal is increased in this way, the black level portion becomes whitish, and the portion close to the white level becomes entirely white, resulting in overexposure.

Therefore, as shown in the figure, the input data area is divided into three areas of areas 1, 2, and 3 in order from the low level side, and the average luminance is increased as a characteristic of the output data with respect to the input data. In some cases, as shown by the polygonal lines L2 and L3, continuous characteristics are set such that the gradient is greater than 1 in the first region, the gradient is 1 or almost 1 in the second region, and the gradient is smaller than 1 in the third region. When lowering the luminance, continuous characteristics are set by setting a slope smaller than 1 in the first area, a slope 1 or almost 1 in the second area, and a slope larger than 1 in the third area, as shown by a polygonal line L4. It is desirable to correct the luminance data according to this characteristic.

FIG. 4 shows, as adjusted images 3E and 3F, images whose image quality has been adjusted with respect to different image quality adjustment items, for example, average brightness and sharpness, and as adjusted image 3G, images whose image quality has been adjusted by combining the two. In this case, in the adjustment images 3E, 3F, and 3G, markers 7e, 7f, and 7g such as characters indicating the respective image quality adjustment items and the combination adjustment are displayed.

According to this, four images 2A, 3E, 3
By comparing F and 3G, it is possible to quickly and accurately obtain the optimum adjustment state for the two image quality adjustment items.

(Compressed image method: FIGS. 5 to 7) FIG.
Indicates a state in which the entire original image 2 before image quality adjustment is displayed on the entire display screen 1. In the second method, image quality adjustment is performed in the image quality adjustment mode by the following method. Hereinafter, this method is referred to as a compressed image method.

<Compressed Two-Image Method—FIG. 5B> In the compressed image method, as an example, as shown in FIG. 5B, the display screen 1 is divided into a left area 1L and a right area 1R. The reduced original image 2a obtained by compressing the original image 2 to the position and size in the left area 1L is displayed in the left area 1L, and the image obtained by compressing the original image 2 to the position and size in the right area 1R. The image in which the image quality has been adjusted is referred to as an adjusted image 3a.
It is displayed in the right area 1R.

In this case, a character 6 indicating that the image displayed on the left area 1L is the image before adjustment is displayed in the left area 1L, and the image displayed on the right area 1R is also adjusted. It is desirable to display a character 7 indicating that the image is a later image. Other signs may be displayed instead of the characters 6 and 7.

In the right area 1R, image quality adjustment items,
It is desirable to display a character 8 indicating the direction or degree of adjustment at that time, or an adjustment parameter. Instead of the character 8, other signs may be displayed.

As described above, the left and right areas 1L,
In the state where the reduced original image 2a and the adjusted image 3a are displayed at the same time in 1R, the person who makes the adjustment sets the optimum adjustment state by changing the direction and degree of the adjustment. At this time, character 8
The part indicating the direction or degree of adjustment or the parameter for adjustment in the middle is also changed accordingly.

According to this, since the image quality can be adjusted while comparing the reduced original image 2a and the adjusted image 3a and while viewing the character 8, the optimum adjustment state can be obtained easily and quickly. .

After the optimum adjustment state is reached, the person who made the adjustment cancels the image quality adjustment mode. As a result, FIG.
As shown in (C), the adjusted image 9 in a state where the image quality of the entire original image 2 has been adjusted is displayed on the entire display screen 1.

The case of performing image quality adjustment on a plurality of image quality adjustment items is the same as the image two-segment method shown in FIG.

<Compressed Four-Image Method—FIGS. 6 and 7> In the compressed image method, as another example, as shown in FIG. 6 or FIG. 7, the display screen 1 is divided into an upper left area, an upper right area, a lower left area, and a right area. The reduced original image 2a obtained by dividing the original image into the lower region and compressing the original image to the position and size of the upper left region is displayed in the upper left region, and the original image is displayed in the upper right region, lower left region, lower right region, and The image obtained by adjusting the image quality of the image compressed to the size is adjusted image 3b or 3
e, 3c or 3f, 3d or 3g are displayed in the upper right area, the lower left area, and the lower right area, respectively.

FIG. 6 shows the adjusted image 3 as in the example of FIG.
The images b, 3c, and 3d are the same image quality adjustment items, for example, images whose image quality has been adjusted by changing the direction or degree of adjustment with respect to the average luminance.
In c and 3d, image quality adjustment items and markers 7b, 7c and 7d such as characters indicating the direction and degree of each adjustment or adjustment parameters are displayed.

FIG. 7 shows the adjusted image 3 as in the example of FIG.
The images e and 3f are displayed with the image quality adjusted for different image quality adjustment items, for example, the average brightness and the sharpness, and the adjusted image 3g is displayed as the adjusted image 3g. , 3g, markers 7e, 7f, 7g such as characters indicating the respective image quality adjustment items and the combination adjustment are displayed.

(Process Routine for Image Quality Adjustment: FIG. 8) In the video reproducing apparatus 10 of FIG. 1, for example, the image quality is adjusted by the process routine shown in FIG.

That is, in this example, the user operates the operation unit 1
When the image quality adjustment mode is set in step 9, first, in step 31
Then, the system control unit 18 determines whether there is a division request.

In this example, when the user sets the image quality adjustment mode, in addition to the image quality adjustment by the method of dividing the display screen of the present invention, such as the above-described image division method and compressed image method, a method of not dividing the display screen When the user selects the method of dividing the display screen, the system control unit 18 proceeds from step 31 to step 32 and performs division setting on the adjustment control unit 17. When the user selects the method of not dividing the display screen, the processing routine proceeds directly from step 31.
Proceed to step 33.

The division setting in step 32 determines whether the division method is the image division method or the compressed image method, and determines the number of divisions as "2" or "4". Do. However, the division method or the number of divisions may be fixed, for example, only the image division method as the division method, or only “2” as the number of divisions.

In step 33, the user performs an image quality adjustment operation to change the direction and degree of the adjustment. Next, in step 34, the system control unit 18 sets the image quality adjustment to the adjustment control unit 17 in accordance with the operation of the user, and
Reference numeral 7 controls the image quality adjustment by the image quality adjustment unit 15 according to the setting.

Next, at step 35, the system control unit 1
Step 8 determines whether the image quality adjustment has been completed. If the user does not cancel the image quality adjustment mode, the process returns to step 33 and the image quality adjustment operation can be continued.

When the user cancels the image quality adjustment mode, the system control unit 18 proceeds from step 35 to step 36, and determines whether or not the division setting has been made in step 32 based on the judgment in step 31, and makes the division setting. If so, proceed to step 37, cancel the split setting,
When the image quality adjustment mode is ended and the division setting is not performed, the image quality adjustment mode is ended as it is.

(Demo Mode: FIG. 9) The video reproducing apparatus 10 shown in FIG. 1 can be set to a demo mode. In this case, the demo mode is an image quality adjustment mode that is performed when a product is displayed at a store, for example, in which a plurality of image quality adjustment values (image quality adjustment parameters) are prepared in advance, and a person who performs the adjustment is provided. By selectively inputting an image quality adjustment preset value, a desired adjustment state can be obtained more easily and quickly.

FIG. 9 shows an example of a processing routine in the demo mode. In this example, when the demo mode is set by a person who performs the adjustment, first, in step 41, the system control unit 18 performs division setting for the adjustment control unit 17.

Next, in step 42, the person who makes the adjustment
Select and input an image quality adjustment preset value.
Then, the system control unit 18 sets the input image quality adjustment preset value in the adjustment control unit 17, and
Controls the image quality adjustment in the image quality adjustment unit 15 according to the set image quality adjustment preset value.

Next, at step 44, the system control unit 1
Step 8 determines whether the demo mode has ended. If the person who makes the adjustment does not cancel the demo mode, step 42
Then, the selection input of the image quality adjustment preset value can be continued.

When the person making the adjustment releases the demo mode,
The system control unit 18 determines from step 44 to step 45
Then, the demo mode is ended after releasing the division setting.

[Embodiment of Image Quality Adjustment Apparatus: FIGS. 10 and 11] (Example of Sequential Processing: FIG. 10) The image quality of the present invention including the image quality adjustment section 15 and the adjustment control section 17 in the video reproduction apparatus 10 of FIG. The adjusting device is configured as shown in FIG. 10 as an example.

The video signal source 50 is the video playback device 1 of FIG.
A value of 0 corresponds to a system from the disk 11 to the MPEG decoder 14, from which input video data, a vertical synchronizing signal and a horizontal synchronizing signal can be obtained. The compression conversion unit 61 and the sequential processing image quality adjustment unit 62 correspond to the image quality adjustment unit 15 in the video reproduction device 10 of FIG. 1, and the division control unit 71 and the signal generation unit 72 perform adjustment control in the video reproduction device 10 of FIG. Part 1
Equivalent to 7.

The division control section 71 uses a vertical synchronization signal and a horizontal synchronization signal from the video signal source 50 and a division setting signal from the system control section 18 to divide the display screen into two or four areas, and Compression converter 61
, And outputs a region identification signal to the signal generation unit 72, and outputs a compression conversion control signal including the region identification signal to the compression conversion unit 61.

The signal generation unit 72 uses the area identification signal from the division control unit 71 and the image quality setting signal from the system control unit 18 based on the image quality adjustment operation on the operation unit 19.
An image quality adjustment signal (image quality adjustment parameter), an emission line signal for displaying the above-described emission lines 4 and 5, and a character signal for displaying the above-described characters 6, 7, and 8 are sequentially processed. Output to the adjusting unit 62.

The signal for image quality adjustment is shown in FIG.
When the display screen is divided into two as in (B), the image data is not subjected to the image quality adjustment processing in the left area of the display screen, and the display screen is divided into four as shown in FIG. 3, FIG. 4, FIG. 6, or FIG.
In the case of division, the image data is not subjected to image quality adjustment processing in the upper left area of the display screen.

In the case of the image division method as shown in FIG. 2B or FIGS. 3 and 4, the compression converter 61 converts the input video data from the video signal source 50 without compression conversion.
It is output to the sequential processing image quality adjustment unit 62 as it is. And
The sequential image quality adjustment unit 62 processes the input video data one pixel at a time, and combines the processed video data with a bright line signal and a character signal to obtain output video data.

In other words, in the case of the image splitting method shown in FIG. 2B, the input video data belonging to the right region is not adjusted for the input video data belonging to the left region of the display screen. Image quality adjustment processing only for
Alternatively, in the case of the image quadrant method shown in FIG. 4, the input video data belonging to the upper right area, the lower left area, and the lower right area are not adjusted for the input video data belonging to the upper left area of the display screen. The image quality adjustment processing is performed only for.

On the other hand, in the case of the compression two-image method as shown in FIG.
Input video data from the
By compressing and reading from the line buffer, the original image based on the input video data is compressed to the position and size in the left area of the display screen, and to the position and size in the right area of the display screen. Compressed video data composed of the video data of the compressed image is generated.

In the case of the compressed four-image method as shown in FIG. 6 or FIG. 7, the compression converter 61 writes the input video data from the video signal source 50 into a frame buffer, compresses the input video data from the frame buffer, and compresses the video data. By reading, the original image based on the input video data is compressed to the position and size of the upper left area of the display screen, and the image data is compressed to the position and size of the upper right area, lower left area, and lower right area of the display screen, respectively. Compressed video data composed of the video data of the compressed image is generated.

Then, the sequential processing picture quality adjusting section 62 processes the compressed converted video data from the compression converting section 61 one pixel at a time, synthesizes a bright line signal and a character signal with the processed video data and outputs the output video data. Get.

(Example of Selected Output--FIG. 11) FIG. 11 shows another example of the image quality adjusting apparatus of the present invention. In this example, the image quality adjustment unit 65 at the subsequent stage of the compression conversion unit 61 is connected to the image quality adjustment circuit 6.
6, the selector 67 and the synthesizing circuit 68, and the image quality adjusting unit 65 selects and outputs one of the video data before the image quality adjusting process and the video data after the image quality adjusting process by the area identification signal.

In the case of the image division method as shown in FIG. 2B or FIG. 3 and FIG.
In the same manner as in the example, the input video data from the video signal source 50 is output to the image quality adjustment unit 65 without compression conversion.

The image quality adjustment section 65 outputs the input video data to the selector 67 as it is, and performs an image quality adjustment process by the image quality adjustment circuit 66 using the image quality adjustment signal from the signal generation section 72. The data is output to the selector 67, and in accordance with the area identification signal from the division control unit 71, in the case of the image splitting method as shown in FIG. The previous video data is extracted, and the video data after the image quality adjustment processing is extracted in the right area.

In the case of the image quadrant method as shown in FIG. 3 or FIG. 4, video data before image quality adjustment processing is extracted in the upper left area of the display screen, and image quality adjustment is performed in the upper right area, lower left area, and lower right area. Retrieve the processed video data.

The combining circuit 68 combines the bright line signal and the character signal from the signal generator 72 with the video data output from the selector 67.

On the other hand, in the case of the compressed image method as shown in FIG. 5B or FIGS.
As in the example of FIG. 10, the input video data from the video signal source 50 is compression-converted.

The image quality adjusting section 65 outputs the compressed converted video data from the compression converting section 61 to the selector 67 as it is, and the image quality adjusting circuit 66 uses the image quality adjusting signal from the signal generating section 72 to adjust the image quality. After processing, the processed video data is output to the selector 67, and in accordance with the area identification signal from the division control unit 71, the selector 67 outputs the image data in the case of the compressed two-image method as shown in FIG. In the left area of the display screen, the compressed converted video data before the image quality adjustment processing is extracted, and in the right area, the compressed converted video data after the image quality adjustment processing is extracted.

In the case of the compressed four-image system as shown in FIG. 6 or FIG. 7, the compression-converted video data before the image quality adjustment processing is extracted from the upper left area of the display screen, and the upper right area, the lower left area, and the lower right area are extracted. The compression-converted video data after the image quality adjustment processing is extracted.

[Other Embodiments] The above-described embodiment is a case where the present invention is applied to a digital video reproducing apparatus. However, the present invention is not limited to this, and may be applied to an image output apparatus such as a digital TV receiver. Can be applied.

[0077]

As described above, according to the present invention, the optimum adjustment state can be obtained simply and quickly.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a system to which the present invention is applied.

FIG. 2 is a diagram illustrating an example of an image quality adjustment method.

FIG. 3 is a diagram illustrating an example of an image quality adjustment method.

FIG. 4 is a diagram illustrating an example of an image quality adjustment method.

FIG. 5 is a diagram illustrating an example of an image quality adjustment method.

FIG. 6 is a diagram illustrating an example of an image quality adjustment method.

FIG. 7 is a diagram illustrating an example of an image quality adjustment method.

8 is a diagram illustrating an example of an image quality adjustment mode processing routine performed by a system control unit of the video reproduction device in FIG. 1;

FIG. 9 is a diagram showing an example of a demo mode processing routine performed by the system control unit of the video reproducing apparatus in FIG. 1;

FIG. 10 is a diagram illustrating an example of an image quality adjustment device.

FIG. 11 is a diagram illustrating an example of an image quality adjustment device.

FIG. 12 is a diagram illustrating an example of a correction characteristic when adjusting the average luminance.

[Explanation of symbols]

Since the main parts are all described in the figure, they are omitted here.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C021 XB02 YC08 ZA03 5C023 AA14 BA07 BA08 CA03 5C025 BA30 CA06 5C026 CA01 CA02 CA10 5C053 FA23 GB37 HA16 HA18 HA33 HA40 LA06

Claims (14)

[Claims] 1. A display screen of an image display device is divided into an original area and an adjustment area, and an image signal of a portion displayed in the original area in the original image or an original image is displayed at a position within the original area and An original signal which is an image signal of an image compressed to a size, an image signal of a portion displayed in the adjustment area in the original image,
Alternatively, an image signal of an image obtained by compressing an original image to a position and a size within the adjustment area and an adjustment signal that is an image signal obtained by performing image quality adjustment processing is combined and output to the image display device, An image quality adjusting method for simultaneously displaying an original image based on the original signal and an adjusted image based on the adjustment signal on a display screen. 2. The image quality adjustment method according to claim 1, wherein the adjustment area is divided into a plurality of areas, and the image quality adjustment processing is performed on each area by changing the direction or extent of adjustment for the same image quality adjustment item. Image quality adjustment method for displaying an adjustment image based on the adjusted adjustment signal. 3. The image quality adjustment method according to claim 1, wherein the adjustment area is divided into a plurality of areas, and an adjustment image based on an adjustment signal obtained by performing image quality adjustment processing on different image quality adjustment items is displayed in each area. Image quality adjustment method. 4. The image quality adjustment method according to claim 1, wherein the adjustment area is divided into three or more areas, and the first area is subjected to image quality adjustment processing for a first image quality adjustment item. An adjustment image based on the adjustment signal is displayed, and a second image quality adjustment process is performed on the second image quality adjustment item in the second area.
A third adjustment is performed in which an adjustment image based on the adjustment signal is displayed, and image quality adjustment processing is performed in the third area by combining the image quality adjustment processing based on the first adjustment signal and the image quality adjustment processing based on the second adjustment signal. An image quality adjustment method for displaying an adjustment image by a signal. 5. The image quality adjustment method according to claim 1, wherein a bright line or another boundary line is added to a composite signal of the original signal and the adjustment signal at a boundary between the original region and the adjustment region. An image quality adjustment method that combines the signals to be displayed. 6. The image quality adjustment method according to claim 1, wherein an image displayed in the original area is an original image in the composite signal of the original signal and the adjustment signal, or the adjustment is performed. An image quality adjustment method for synthesizing a signal for displaying a sign indicating that an image displayed in an area is an adjustment image. 7. The image quality adjusting method according to claim 1, wherein a composite signal of the original signal and the adjustment signal includes an image quality adjustment item, an adjustment direction or degree, or an adjustment value for the adjustment image. An image quality adjustment method for synthesizing a signal for displaying a sign indicating a parameter. 8. A division control section for dividing a display screen of an image display device into an original area and an adjustment area, and outputting an area identification signal. An image quality adjustment device comprising: an image quality adjustment unit that processes and outputs an original image signal so as to perform image quality adjustment processing only on an image signal of a portion displayed in the adjustment region in an image. 9. The image quality adjusting device according to claim 8, wherein the image quality adjusting unit processes and outputs the original image signal pixel by pixel. 10. The image quality adjusting device according to claim 8, wherein the image quality adjusting unit is configured to convert one of the original image signal and an image signal after image quality adjustment processing is performed on the original image signal by the area identification signal. Image quality adjustment device for selecting and outputting. 11. A division control unit that divides a display screen of an image display device into an original region and an adjustment region, outputs a region identification signal, and identifies the region by the region identification signal. A compression for generating a compression-converted image signal including an image signal of an image obtained by compressing an original image to a position and a size in the original region and an image signal of an image obtained by compressing the original image to a position and a size in the adjustment region. A conversion unit, processing the compressed converted image signal so as to perform image quality adjustment processing only on an image signal of an image compressed to a position and a size in the adjustment area by identifying an area by the area identification signal. And an image quality adjustment unit that outputs the image. 12. The image quality adjusting device according to claim 11, wherein the image quality adjusting unit processes and outputs the compressed converted image signal pixel by pixel. 13. The image quality adjusting device according to claim 11, wherein the image quality adjusting unit is configured to convert any one of the compression-converted image signal and an image signal obtained by performing an image quality adjustment process on the compressed converted image signal.
An image quality adjustment device for selecting and outputting the image according to the area identification signal; 14. An image quality adjusting device for performing image quality adjustment according to any one of claims 1 to 7 or an image quality adjusting device according to any one of claims 8 to 13 as an image quality adjusting section, and an image signal output from the image quality adjusting device. Image output device for outputting the image to an image display device.